柯林斯词典buckthorn /ˈbʌkˌθɔːn/ 1. N any of several thorny small-flowered shrubs of the genus Rhamnus, esp the Eurasian species R. cathartica, whose berries were formerly used as a purgative: family Rhamnaceae 鼠李植物→see alsosea buckthorn 返回 buckthorn